YEAR,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,Annual 24-hr Avg.
1998,3370,3770,3872,3991,4137,4307,3739,3982,4258,4411,3935,3578,3946
1999,3663,3744,4008,4206,4228,4734,4825,5025,4583,4624,4064,3686,4283
2000,3580,3801,4052,4162,4276,4562,4731,4823,4431,4233,3856,3461,4164
2001,3564,3635,4045,4170,4343,4624,4723,4887,4475,4269,3816,3285,4153
2002,3446,3777,3800,3873,4295,4483,4796,5013,4570,4969,4278,3735,4253
2003,3458,4087,4205,4579,4300,4701,4734,5351,4869,4450,3630,3260,4302
2004,2994,3472,3753,3844,4009,4192,4615,4623,4509,4113,3591,3340,3921
2005,
2006,
2007,
2008,
2009,